GROWTH OF β BaB2O4 SINGLE GRYSTALS AND SHG EFFICIENCY MEASUREMENTS B. FERRAND, I. CHARTIER, C. COATANTIEC, M. COUCHAUD, G. ROLLAND, Ch. WYON, J.J. AUBERT et D. DOIZI J. Phys. IV France, 01 C7 (1991) C7-753-C7-756 DOI: 10.1051/jp4:19917202